CN108623463A - A kind of production of toluene diisocyanate methylbenzene nitration process two returns a pipe Optimal improvements system - Google Patents
A kind of production of toluene diisocyanate methylbenzene nitration process two returns a pipe Optimal improvements system Download PDFInfo
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- CN108623463A CN108623463A CN201810576170.2A CN201810576170A CN108623463A CN 108623463 A CN108623463 A CN 108623463A CN 201810576170 A CN201810576170 A CN 201810576170A CN 108623463 A CN108623463 A CN 108623463A
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- pipeline
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/08—Preparation of nitro compounds by substitution of hydrogen atoms by nitro groups
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- Organic Chemistry (AREA)
Abstract
The invention discloses a kind of production of toluene diisocyanate methylbenzene nitration processes two to return a pipe Optimal improvements system, including dinitro separator S13A13, the dinitro separator S13A13 is fixedly connected with horizontally disposed first pipe, it is fixedly connected with valve among the first pipe, the first pipe other end is fixedly connected with vertically disposed second pipe, it is fixedly connected with horizontally disposed third pipeline among valve and dinitro separator S13A13, the third pipeline other end is fixedly connected with the 4th pipeline being vertically arranged, the 4th pipeline upper end is fixedly connected with interfacial level controller, the interfacial level controller other end, which is fixedly connected to be horizontally disposed with, the 5th pipeline.The present invention both ensure that the spent acid that di-nitrated circuit comes smooth can flow into a nitrification circuit, in turn ensures that a nitrification circuit can fully react, so that system is kept steady production and promote security performance.
Description
Technical field
The present invention relates to technical field of chemical production equipment, specially a kind of production of toluene diisocyanate methylbenzene nitration work
Sequence two returns pipe optimization.
Background technology
During production of toluene diisocyanate, the product dinitrotoluene (DNT) (DNT) of methylbenzene nitration process therein is
In two concatenated pump type nitrification circuits, generation is constantly nitrified by the toluene in nitric acid and sulfuric acid mixture liquid, sulfuric acid is done
It participates in reacting for catalyst.The spent acid adverse current that wherein di-nitrated circuit generates is back to a nitrification circuit and participates in reaction；One nitrification
Circuit cycle temperature is controlled at 39 DEG C, and at 62 DEG C, partial organic substances are contained in di-nitrated circuit for di-nitrated circuit cycle temperature control
Spent acid through two return a pipeline flow into one nitrification mixing tee, at this time due to temperature difference, partial organic substances can return a pipeline two
It is blocked at nozzle, causes two to return unsmooth, one nitration reaction of influence and a di-nitrated DNT extraction.
Invention content
The purpose of the present invention is to solve pipe disadvantages existing in the prior art, and a kind of toluene two proposed is different
Cyanate production methylbenzene nitration process two returns a pipe Optimal improvements system.
To achieve the goals above, present invention employs following technical solutions：
A kind of production of toluene diisocyanate methylbenzene nitration process two returns a pipe Optimal improvements system, including di-nitrated separation
Device S13A13, the dinitro separator S13A13 are fixedly connected with horizontally disposed first pipe, among the first pipe
It is fixedly connected with valve, the first pipe other end is fixedly connected with vertically disposed second pipe, is located at valve and dinitro
Horizontally disposed third pipeline is fixedly connected among separator S13A13, the third pipeline other end is fixedly connected with perpendicular
The 4th pipeline being directly arranged, the 4th pipeline upper end are fixedly connected with interfacial level controller, and the interfacial level controller other end is solid
Fixed connection is horizontally disposed the 5th pipeline, and the 5th pipeline other end is fixedly connected with the 6th pipeline being vertically arranged, described
The second pipe other end is fixedly connected with horizontally disposed 7th pipeline, and the other end of the 6th pipeline is fixedly connected on the 7th
On pipeline, the 7th pipeline other end is fixedly connected with the 8th pipeline being vertically arranged, and the 8th pipeline passes through the first pipe
Pipeline joint is fixedly connected with the 9th pipeline, and the 9th pipeline other end is connected with plumbing nozzle by second pipe interface, institute
It states the plumbing nozzle other end to extend in mixing tee M13A04, the plumbing nozzle is fixedly connected on mixing three by ring flange
On logical M13A04.
Preferably, the plumbing nozzle insertion depth L is 442.5mm, and the plumbing nozzle angle [alpha] is 135 °.
Preferably, the first pipe interface uses 45 ° of elbows, the second pipe interface to use 45 ° of elbows.
Preferably, the interfacial level controller and mixing tee M13A04 differences in height are 4 meters.
Preferably, it is connected with electric pump among the third pipeline.
The beneficial effects of the invention are as follows：By being 45 ° in first pipe interface and second pipe interface angle of bend,
Not only ensured that di-nitrated circuit spent acid smooth can flow into a nitrification circuit in the case of resistance of ducting minimum, but also do not influenced scene
The reaction of system continuous-stable is arranged and influenced to pipeline, this pipeline trend is designed as trend of the present invention, more original pipeline is walked
It is 442.5mm and plumbing nozzle angle angle by detailed calculator plumbing nozzle insertion depth L to reducing by 4 elbow bends
α is 135 °, and the present invention both ensure that the spent acid that di-nitrated circuit comes smooth can flow into a nitrification circuit, in turn ensure a nitrification
Circuit can fully react, and so that system is kept steady production and promote security performance.
Description of the drawings
Fig. 1 is that a kind of production of toluene diisocyanate methylbenzene nitration process two proposed by the present invention returns a pipe Optimal improvements system
The pipeline rout schematic diagram of system；
Fig. 2 is that a kind of production of toluene diisocyanate methylbenzene nitration process two proposed by the present invention returns a pipe Optimal improvements system
The pipeline of system is original to move towards schematic diagram；
Fig. 3 is that a kind of production of toluene diisocyanate methylbenzene nitration process two proposed by the present invention returns a pipe Optimal improvements system
The plumbing nozzle schematic diagram of system；
Fig. 4 is that a kind of production of toluene diisocyanate methylbenzene nitration process two proposed by the present invention returns a pipe Optimal improvements system
Original plumbing nozzle schematic diagram of system；
Fig. 5 is that a kind of production of toluene diisocyanate methylbenzene nitration process two proposed by the present invention returns a pipe Optimal improvements system
The nozzle sectional view of system；
Fig. 6 is that a kind of production of toluene diisocyanate methylbenzene nitration process two proposed by the present invention returns a pipe Optimal improvements system
Original nozzle sectional view of system.
In figure：1, dinitro separator S13A13,2 first pipes, 3 third pipelines, 4 the 4th pipelines, 5 interfacial level controllers, 6
Second pipe, 7 the 5th pipelines, 8 the 6th pipelines, 9 valves, 10 the 7th pipelines, 11 the 8th pipelines, 12 the 9th pipelines, 13 mixing three
Logical M13A04,14 plumbing nozzles.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-6, a kind of production of toluene diisocyanate methylbenzene nitration process two returns a pipe Optimal improvements system, including
Dinitro separator S13A13, dinitro separator S13A13 are fixedly connected with horizontally disposed first pipe 2, first pipe 2
Centre is fixedly connected with valve 9, and 2 other end of first pipe is fixedly connected with vertically disposed second pipe 6, be located at valve 9 with
Horizontally disposed third pipeline 3 is fixedly connected among dinitro separator S13A13,3 other end of third pipeline is fixedly connected with
The 4th pipeline 4 being vertically arranged, 4 upper end of the 4th pipeline are fixedly connected with interfacial level controller 5, and 5 other end of interfacial level controller is fixed
Connection is horizontally disposed to have the 5th pipeline 7,7 other end of the 5th pipeline to be fixedly connected with the 6th pipeline 8 being vertically arranged, second pipe
6 other ends are fixedly connected with horizontally disposed 7th pipeline 10, and the other end of the 6th pipeline 8 is fixedly connected on the 7th pipeline 10
On, 10 other end of the 7th pipeline is fixedly connected with the 8th pipeline 11 being vertically arranged, and the 8th pipeline 11 passes through first pipe interface
It is fixedly connected with the 9th pipeline 12,12 other end of the 9th pipeline is connected with plumbing nozzle 14, pipeline spray by second pipe interface
14 other end of mouth extends in mixing tee mixing tee M13A04, and plumbing nozzle 14 is fixedly connected on mixing three by ring flange
14 insertion depth L of plumbing nozzle is 442.5mm on logical M13A04, and 14 angle [alpha] of plumbing nozzle is 135 °, and first pipe interface uses
45 ° of elbows, it is 4 meters with mixing tee M13A04 differences in height that second pipe interface, which uses 45 ° of elbows, interfacial level controller 5, third pipe
It is connected with electric pump among road 3.
In the present invention, di-nitrated circuit spent acid is to flow into a nitrification circuit by gravity and participate in reaction, this optimization side
It is 45 ° that case, which is mainly manifested in first pipe interface and second pipe interface angle of bend, through repeatedly calculating and testing, is both being protected
Demonstrate,prove di-nitrated circuit spent acid smooth can flow into a nitrification circuit in the case of resistance of ducting minimum, and not influence live pipeline
What arrangement and influence system continuous-stable reacted, this pipeline trend is designed as trend of the present invention, more original pipeline trend subtracts
Few 4 elbow bends, as shown in figure 3, former design two is returned a nitration mixture pipeline and entered after mixing tee mixing tee M13A04 towards just
Top carries out sprinkling dispersed material around by aperture so that reaction is more abundant.But due to temperature difference, di-nitrated circuit is contained
The spent acid of partial organic substances returns a pipeline through two and flows into a nitrification circuit, and partial organic substances can be returned two and be blocked up at a pipeline nozzle
Plug causes two to return unsmooth, one nitration reaction of influence and a di-nitrated DNT extraction.Now by nozzle from new design, by calculating in detail
14 insertion depth L of device plumbing nozzle is 442.5mm and 14 angle angle [alpha] of plumbing nozzle is 135 °, and the present invention both ensure that dinitro
Changing the spent acid that circuit comes smooth can flow into a nitrification circuit, in turn ensure that a nitrification circuit can fully react, system is made to keep
Steady production and promote security performance.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of production of toluene diisocyanate methylbenzene nitration process two returns a pipe Optimal improvements system, including dinitro separator
S13A13 (1), which is characterized in that the dinitro separator S13A13 (1) is fixedly connected with horizontally disposed first pipe
(2), it is fixedly connected with valve (9) among the first pipe (2), first pipe (2) other end is fixedly connected with vertically
The second pipe (6) of setting is fixedly connected with horizontally disposed among valve (9) and dinitro separator S13A13 (1)
Third pipeline (3), third pipeline (3) other end are fixedly connected with the 4th pipeline (4) being vertically arranged, the 4th pipeline
(4) upper end is fixedly connected with interfacial level controller (5), and interfacial level controller (5) other end, which is fixedly connected to be horizontally disposed with, the 5th
Pipeline (7), the 5th pipeline (7) other end are fixedly connected with the 6th pipeline (8) being vertically arranged, the second pipe (6)
The other end is fixedly connected with horizontally disposed 7th pipeline (10), and the other end of the 6th pipeline (8) is fixedly connected on the 7th
On pipeline (10), the 7th pipeline (10) other end is fixedly connected with the 8th pipeline (11) being vertically arranged, the 8th pipe
Road (11) is fixedly connected with the 9th pipeline (12) by first pipe interface, and the 9th pipeline (12) other end passes through the second pipe
Pipeline joint is connected with plumbing nozzle (14), and plumbing nozzle (14) other end extends in mixing tee M13A04 (13), institute
Plumbing nozzle (14) is stated to be fixedly connected on mixing tee M13A04 (13) by ring flange.
2. a kind of production of toluene diisocyanate methylbenzene nitration process two according to claim 1 returns a pipe Optimal improvements system
System, which is characterized in that plumbing nozzle (14) the insertion depth L is 442.5mm, and plumbing nozzle (14) angle [alpha] is 135 °.
3. a kind of production of toluene diisocyanate methylbenzene nitration process two according to claim 1 returns a pipe Optimal improvements system
System, which is characterized in that the first pipe interface uses 45 ° of elbows, the second pipe interface to use 45 ° of elbows.
4. a kind of production of toluene diisocyanate methylbenzene nitration process two according to claim 1 returns a pipe Optimal improvements system
System, which is characterized in that the interfacial level controller (5) is 4 meters with mixing tee M13A04 (13) difference in height.
5. a kind of production of toluene diisocyanate methylbenzene nitration process two according to claim 1 returns a pipe Optimal improvements system
System, which is characterized in that be connected with electric pump among the third pipeline (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810576170.2A CN108623463A (en) | 2018-06-06 | 2018-06-06 | A kind of production of toluene diisocyanate methylbenzene nitration process two returns a pipe Optimal improvements system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810576170.2A CN108623463A (en) | 2018-06-06 | 2018-06-06 | A kind of production of toluene diisocyanate methylbenzene nitration process two returns a pipe Optimal improvements system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108623463A true CN108623463A (en) | 2018-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810576170.2A Pending CN108623463A (en) | 2018-06-06 | 2018-06-06 | A kind of production of toluene diisocyanate methylbenzene nitration process two returns a pipe Optimal improvements system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793106A (en) * | 2006-01-17 | 2006-06-28 | 甘肃银光化学工业集团有限公司 | Process for continuous preparing diruitro methylbenzele and apparatus thereof |
| CN101085750A (en) * | 2006-06-07 | 2007-12-12 | 拜尔材料科学股份公司 | Method for producing toluene diisocyanate |
| CN101679222A (en) * | 2007-06-27 | 2010-03-24 | Hrd有限公司 | System and process for production of toluene diisocyanate |
| CN103492364A (en) * | 2011-05-18 | 2014-01-01 | 三井化学株式会社 | Method for manufacturing tolylene diisocyanate |
| CN105102419A (en) * | 2012-12-20 | 2015-11-25 | 巴斯夫欧洲公司 | Separation method for dinitrotoluene and mixed acid in a toluene to dinitrotoluene process |
| CN206661163U (en) * | 2017-03-08 | 2017-11-24 | 福建省东南电化股份有限公司 | A kind of reaction unit for producing toluene di-isocyanate(TDI) |
-
2018
- 2018-06-06 CN CN201810576170.2A patent/CN108623463A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793106A (en) * | 2006-01-17 | 2006-06-28 | 甘肃银光化学工业集团有限公司 | Process for continuous preparing diruitro methylbenzele and apparatus thereof |
| CN101085750A (en) * | 2006-06-07 | 2007-12-12 | 拜尔材料科学股份公司 | Method for producing toluene diisocyanate |
| CN101679222A (en) * | 2007-06-27 | 2010-03-24 | Hrd有限公司 | System and process for production of toluene diisocyanate |
| CN103492364A (en) * | 2011-05-18 | 2014-01-01 | 三井化学株式会社 | Method for manufacturing tolylene diisocyanate |
| CN105102419A (en) * | 2012-12-20 | 2015-11-25 | 巴斯夫欧洲公司 | Separation method for dinitrotoluene and mixed acid in a toluene to dinitrotoluene process |
| CN206661163U (en) * | 2017-03-08 | 2017-11-24 | 福建省东南电化股份有限公司 | A kind of reaction unit for producing toluene di-isocyanate(TDI) |
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Application publication date: 20181009 |